Velocity-Dependent Models for Non-Abelian/Entangled String Networks

Understand

We develop velocity-dependent models describing the evolution of string networks that involve several types of interacting strings, each with a different tension.

• These incorporate the formation of Y-type junctions with links stretching between colliding strings, while always ensuring energy conservation.
• These models can be used to describe network evolution for non-abelian strings as well as cosmic superstrings.
• The application to $Z_{N}$ strings in which interactions are topologically constrained, demonstrates that a scaling regime is generally reached which involves a hierarchy of string densities with the lightest most abundant.